Labour has claimed an "administrative error" was to blame for suggesting Jeremy Corbyn may not make it to the end of the year as leader.

A vacancy for a spokesman role was advertised to last as long as Mr Corbyn is in charge or until the end of 2016, "whichever is sooner".

Labour has blamed the blunder on an "administrative error" and said it has been changed.

Spokesman Kevin Slocombe said: "It has now been amended - it says 'for as long as Jeremy Corbyn is the leader'.

"I think HR put a line on it for a different advert. I think it's a matter of an administrative error."

The original job description for leader's office media spokesperson, which pays £41,744 a year, said: "Fixed-term contract for the period only that Jeremy Corbyn is the leader of the Labour Party, or until 31st December 2016, whichever is sooner."